Thank you very much to you both for replying.I tried the first using partial fractions and substitution,but got stuck and the second one i still have no idea how to go forward.
Thank you TheCoffeeMachine.If it is is'nt too much for you could you please help me with the second one too.

... is the chain rule. Straight continuous lines differentiate downwards (integrate up) with respect to the main variable (in this case ), and the straight dashed line similarly but with respect to the dashed balloon expression (the inner function of the composite which is subject to the chain rule).

Thank you very much to you both for replying.I tried the first using partial fractions and substitution,but got stuck and the second one i still have no idea how to go forward.
Thank you TheCoffeeMachine.If it is is'nt too much for you could you please help me with the second one too.

You should post all the work you have done and then say specifically where you are stuck.